The Wedding Guest EditMaster Every Dress Code (and Destination!) in Style Vogue The groundbreaking dress code at Vogue's annual Pre Met Party? Florals, for spring, of course. Last night, a fashionable crew gathered at the Dutch Flower Line, a New York City floral market, to Dress Code: How Kelly Wearstler Chooses Party Ready Outfits That Tell a Story Vogue What's appropriate for a cocktail dress code can vary depending on the occasion, the time of year, and even the hosts.